Calliope

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

A calliope (not to be confused with mechanical organs) (see below for pronunciation) is an American musical instrument that produces sound by sending a gas, originally steam or, more recently, compressed air, through large whistles—originally locomotive whistles.

Excerpt from the Wikipedia article “Calliope (instrument)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Gibson & Co., Public domain, via Wikimedia Commons.